16 Cards in this Set

Define vapor pressure and partial pressure. Understand the factors which do and don’t influence vapor and partial pressure.

Vapor pressure is the pressure exerted by a gas: affected by heat, other gasses present
Partial pressure is the part of the total pressure of a mix of gasses that is exerted by one component of the mix: not affected by other gasses

What physical measurement must be stated along with vapor pressure.

Temperature

Describe the difference between vapor pressure and vapor concentration. Which is used to describe how much anesthetic is
being administered? Which is best correlated to the clinical effect?

vapor concentration is the percent of the mixture that is a particular gas: Concentration is most often used(vapor% or %): partial pressure

Define partition coefficient.

A partition coefficient is the ratio of the concentration of a substance in one medium relative to another at equilibrium.

The partial pressure exerted by a gas is independent of other gases in the mixture; therefore the partial pressure exerted by an
anesthetic gas in an inspired gas mixture is the is the same as it would be if the gas were by itself.

What is Boyle's Law?

If the temperature is kept constant and the volume of the container is reduced, the molecules of gas will have the same kinetic energy, but collide with the walls
of the container more often. Boyle Law - PV = Constant. When used to examine the effect of changes in pressure or volume it is commonly written as
P1V1=P2V2.

What is Charle's Law?

If heat energy is added to a system, kinetic energy will increase. That will cause the gas molecules to collide with the walls more
frequently. If the pressure is kept constant, the volume of the container must increase. This is expressed as Charles as Law: V/T =Constant.
A more common expression when considering the effect of a change in temperature or volume is V1/T /T1=V =V2/T /T2. Temperature is in Kelvin.

What is Henry's Law?

The general definition of Henry's law is: the solubility of a gas in a liquid is proportional tothe pressure of the gas over the solution.
From it you can derive the following formula: c=kP Henry's Law constant is dependent only on temperature.